Jawabanmu

2014-02-11T20:06:29+07:00
Rusuk dalam=140-21=119cm=1,19m volume= 1,19x1,19=1,4161m 2/5 x 1,4161=0,56
2014-02-11T22:04:53+07:00
V = S³
V = 140 X 140 X 140
V = 2744000

Volume Air = (2744000 - (Tebal Dinding keseluruhan)) X 2/5
Volume Air = (2744000 - (21 X 5)) X 2/5
Volume Air = (2744000 - 105)) X 2/5
Volume Air = 2743895 X 2/5
Volume Air = 1097558 cm²

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